1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the Qt Designer of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
9 | ** Commercial License Usage |
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15 | ** information use the contact form at https://www.qt.io/contact-us. |
16 | ** |
17 | ** GNU General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU |
19 | ** General Public License version 3 as published by the Free Software |
20 | ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT |
21 | ** included in the packaging of this file. Please review the following |
22 | ** information to ensure the GNU General Public License requirements will |
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24 | ** |
25 | ** $QT_END_LICENSE$ |
26 | ** |
27 | ****************************************************************************/ |
28 | |
29 | // |
30 | // W A R N I N G |
31 | // ------------- |
32 | // |
33 | // This file is not part of the Qt API. It exists for the convenience |
34 | // of Qt Designer. This header |
35 | // file may change from version to version without notice, or even be removed. |
36 | // |
37 | // We mean it. |
38 | // |
39 | |
40 | #ifndef QDESIGNER_DNDITEM_H |
41 | #define QDESIGNER_DNDITEM_H |
42 | |
43 | #include "shared_global_p.h" |
44 | #include <QtDesigner/abstractdnditem.h> |
45 | |
46 | #include <QtCore/qpoint.h> |
47 | #include <QtCore/qlist.h> |
48 | #include <QtCore/qmimedata.h> |
49 | |
50 | QT_BEGIN_NAMESPACE |
51 | |
52 | class QDrag; |
53 | class QImage; |
54 | class QDropEvent; |
55 | |
56 | namespace qdesigner_internal { |
57 | |
58 | class QDESIGNER_SHARED_EXPORT QDesignerDnDItem: public QDesignerDnDItemInterface |
59 | { |
60 | public: |
61 | explicit QDesignerDnDItem(DropType type, QWidget *source = nullptr); |
62 | ~QDesignerDnDItem() override; |
63 | |
64 | DomUI *domUi() const override; |
65 | QWidget *decoration() const override; |
66 | QWidget *widget() const override; |
67 | QPoint hotSpot() const override; |
68 | QWidget *source() const override; |
69 | |
70 | DropType type() const override; |
71 | |
72 | protected: |
73 | void setDomUi(DomUI *dom_ui); |
74 | void init(DomUI *ui, QWidget *widget, QWidget *decoration, const QPoint &global_mouse_pos); |
75 | |
76 | private: |
77 | QWidget *m_source; |
78 | const DropType m_type; |
79 | const QPoint m_globalStartPos; |
80 | DomUI *m_dom_ui; |
81 | QWidget *m_widget; |
82 | QWidget *m_decoration; |
83 | QPoint m_hot_spot; |
84 | |
85 | Q_DISABLE_COPY_MOVE(QDesignerDnDItem) |
86 | }; |
87 | |
88 | // Mime data for use with designer drag and drop operations. |
89 | |
90 | class QDESIGNER_SHARED_EXPORT QDesignerMimeData : public QMimeData { |
91 | Q_OBJECT |
92 | |
93 | public: |
94 | using QDesignerDnDItems = QList<QDesignerDnDItemInterface *>; |
95 | |
96 | ~QDesignerMimeData() override; |
97 | |
98 | const QDesignerDnDItems &items() const { return m_items; } |
99 | |
100 | // Execute a drag and drop operation. |
101 | static Qt::DropAction execDrag(const QDesignerDnDItems &items, QWidget * dragSource); |
102 | |
103 | QPoint hotSpot() const { return m_hotSpot; } |
104 | |
105 | // Move the decoration. Required for drops over form windows as the position |
106 | // is derived from the decoration position. |
107 | void moveDecoration(const QPoint &globalPos) const; |
108 | |
109 | // For a move operation, create the undo command sequence to remove |
110 | // the widgets from the source form. |
111 | static void removeMovedWidgetsFromSourceForm(const QDesignerDnDItems &items); |
112 | |
113 | // Accept an event with the proper action. |
114 | void acceptEvent(QDropEvent *e) const; |
115 | |
116 | // Helper to accept an event with the desired action. |
117 | static void acceptEventWithAction(Qt::DropAction desiredAction, QDropEvent *e); |
118 | |
119 | private: |
120 | QDesignerMimeData(const QDesignerDnDItems &items, QDrag *drag); |
121 | Qt::DropAction proposedDropAction() const; |
122 | |
123 | static void setImageTransparency(QImage &image, int alpha); |
124 | |
125 | const QDesignerDnDItems m_items; |
126 | QPoint m_globalStartPos; |
127 | QPoint m_hotSpot; |
128 | }; |
129 | |
130 | } // namespace qdesigner_internal |
131 | |
132 | QT_END_NAMESPACE |
133 | |
134 | #endif // QDESIGNER_DNDITEM_H |
135 | |